<template>
  <div class="player" v-show="playlist.length>0">
    <transition name="normal"
                @enter="enter"
                @after-enter="afterEnter"
                @leave="leave"
                @after-leave="afterLeave"
    >
    <div class="normal-player" v-show="fullScreen">
      <div class="background">
        <img width="100" height="100%" :src="currentSong.image">
      </div>
      <div class="top">
        <div class="back" @click="back">
          <i class="icon-back"></i>
        </div>
        <h1 class="title" v-html="currentSong.name"></h1>
        <h2 class="subtitle" v-html="currentSong.singer"></h2>
      </div>
      <div class="middle" >
       <div class="middle-l">
         <div class="cd-wrapper" ref="cdWrapper">
            <div class="cd" :class="cdCls">
               <img class="image" :src="currentSong.image">
             </div>
          </div>
        </div>
      </div>
      <div class="bottom" >
        <div class="operators">
          <div class="icon i-left">
            <i class="icon-sequence"></i>
          </div>
          <div class="icon i-left" :class="disableCls">
            <i @click="prev" class="icon-prev"></i>
          </div>
          <div class="icon i-center" :class="disableCls">
            <i @click="togglePlaying" :class="playIcon"></i>
          </div>
          <div class="icon i-right" :class="disableCls">
            <i @click="next" class="icon-next"></i>
          </div>
          <div class="icon i-right" >
             <i class="icon icon-not-favorite"></i>
          </div>
        </div>
      </div>
    </div>
    </transition>
    <transition name="mini">
    <div class="mini-player" v-show="!fullScreen" @click="open">
      <div class="icon">
        <img :class="cdCls" width="40" heitht="40" :src="currentSong.image">
      </div>
      <div class="text">
        <h2 class="name" v-html="currentSong.name"></h2>
        <p class="desc" v-html="currentSong.singer"></p>
      </div>
      <div class="control">
          <i @click.stop="togglePlaying" :class="miniIcon"></i>
      </div>
        
      <div class="control">
        <i class="icon-playlist"></i>
        </div>
    </div>
    </transition>
    <audio ref="audio" :src="currentSong.url" @canplay="ready" @error="error"></audio>
  </div>
</template>

<script type="text/ecmascript-6">
  import {mapGetters, mapMutations} from 'vuex'
  import animations from 'create-keyframe-animation'
  import {prefixStyle} from 'common/js/dom'

  const transform = prefixStyle('transform')

  export default {
    data() {
      return {
        songReady: false,
        currentTime: 0,
        radius: 32,
        currentLyric: null,
        currentLineNum: 0,
        currentShow: 'cd',
        playingLyric: ''
      }
    },
    computed: {
      cdCls() {
        return this.playing ? 'play' : 'play pause'
      },
      playIcon() {
         return this.playing ? 'icon-pause' : 'icon-play'
       },
       miniIcon() {
         return this.playing ? 'icon-pause-mini' : 'icon-play-mini'
       },
      disableCls() {
        return this.songReady? '' : 'disable'
      },
       ...mapGetters([
           'fullScreen',
           'playlist',
           'currentSong',
           'playing',
           'currentIndex'
       ])
     },
     methods: {
       back() {
         this.setFullScreen(false)
       },
       open() {
        this.setFullScreen(true)
       },
       enter(el,done){
         const {x,y,scale}=this._getPosAndScale()

        let animation={
           0:{
             transform:`translate3d(${x}px,${y}px,0) scale(${scale})`
           },
           60:{
             transform:`translate3d(0,0,0) scale(1.1)`
           },
          100:{
             transform:`translate3d(0,0,0) scale(1)`
          }
        }
        animations.registerAnimation({
          name:'move',
          animation,
          presets:{
            duration:400,
            easing:'linear'
          }
        })
        animations.runAnimation(this.$refs.cdWrapper,'move',done)
      },
      afterEnter(){
        animations.unregisterAnimation('move')
        this.$refs.cdWrapper.style.animation=''
      },
      leave(el,done){
        this.$refs.cdWrapper.style.transition='all 0.4s'
        const {x,y,scale}=this._getPosAndScale()
        this.$refs.cdWrapper.style[transform]=`translate3d(${x}px,${y}px,0) scale(${scale})`
        this.$refs.cdWrapper.addEventListener('transitionend',done)
      },
      afterLeave(){
        this.$refs.cdWrapper.style.transition=''
        this.$refs.cdWrapper.style[transform]=''
      },
      togglePlaying() {
        this.setPlayingState(!this.playing)
      },
      _getPosAndScale(){
        const targetWidth = 40
        const paddingLeft = 40
        const paddingBottom = 30
        const paddingTop = 80
        const width = window.innerWidth * 0.8
        const scale = targetWidth/ width
        const x = -(window.innerWidth / 2 - paddingLeft)
        const y = window.innerHeight - paddingTop - width / 2 - paddingBottom
        return{
          x,
          y,
          scale
        }
      },
      next() {
        if (!this.songReady) {
          return
        }
        if (this.playlist.length === 1 ) {
          this.loop()
        }else {
          let index = this.currentIndex + 1
          if (index === this.playlist.length) {
            index = 0
          }
          this.setCurrentIndex(index)
          if (!this.playing) {
            this.togglePlaying()
          }
        }
        this.songReady = false
      },
      prev() {
        if (!this.songReady) {
          return
        }
        if (this.playlist.length === 1) {
          this.loop()
        }else {
          let index = this.currentIndex - 1
          if (index === -1) {
            index = this.playlist.length - 1
          }
          this.setCurrentIndex(index)
          if (!this.playing) {
            this.togglePlaying()
          }
        }
        this.songReady = false
      },
      ready() {
        this.songReady = true
      },
      error() {
        this.songReady = true
      },
       ...mapMutations({
         setFullScreen: 'SET_FULL_SCREEN',
         setPlayingState: 'SET_PLAYING_STATE',
         setCurrentIndex:'SET_CURRENT_INDEX',
         setPlayMode:'SET_PLAY_MODE',
         setPlaylist:'SET_PLAYLIST'
       })
     },
     watch: {
       currentSong() {
        this.$nextTick(() =>{
          this.$refs.audio.play()
        })  
       },
       playing(newPlaying) {
         const audio = this.$refs.audio
          this.$nextTick(() =>{
         newPlaying ? audio.play() : audio.pause()
          })
       }
     }
   } 
</script>




<style scoped lang="stylus" rel="stylesheet/stylus">
@import '~common/stylus/variable';
@import '~common/stylus/mixin';

.player {
    .normal-player {
        position: fixed;
        left: 0;
        right: 0;
        top: 0;
        bottom: 0;
        z-index: 150;
        background: $color-background;

        .background {
            position: absolute;
            left: 0;
            top: 0;
            width: 100%;
            height: 100%;
            z-index: -1;
            opacity: 0.6;
            filter: blur(20px);
        }

        .top {
            position: relative;
            margin-bottom: 25px;

            .back {
                position: absolute;
                top: 0;
                left: 6px;
                z-index: 50;

                .icon-back {
                    display: block;
                    padding: 9px;
                    font-size: $font-size-large-x;
                    color: $color-theme;
                    transform: rotate(-90deg);
                }
            }

            .title {
                width: 70%;
                margin: 0 auto;
                line-height: 40px;
                text-align: center;
                no-wrap();
                font-size: $font-size-large;
                color: $color-text;
            }

            .subtitle {
                line-height: 20px;
                text-align: center;
                font-size: $font-size-medium;
                color: $color-text;
            }
        }

        .middle {
            position: fixed;
            width: 100%;
            top: 80px;
            bottom: 170px;
            white-space: nowrap;
            font-size: 0;

            .middle-l {
                display: inline-block;
                vertical-align: top;
                position: relative;
                width: 100%;
                height: 0;
                padding-top: 80%;

                .cd-wrapper {
                    position: absolute;
                    left: 10%;
                    top: 0;
                    width: 80%;
                    height: 100%;

                    .cd {
                        width: 100%;
                        height: 100%;
                        box-sizing: border-box;
                        border: 10px solid rgba(255, 255, 255, 0.1);
                        border-radius: 50%;

                        &.play {
                            animation: rotate 20s linear infinite;
                        }

                        &.pause {
                            animation-play-state: paused;
                        }

                        .image {
                            position: absolute;
                            left: 0;
                            top: 0;
                            width: 100%;
                            height: 100%;
                            border-radius: 50%;
                        }
                    }
                }

                .playing-lyric-wrapper {
                    width: 80%;
                    margin: 30px auto 0 auto;
                    overflow: hidden;
                    text-align: center;

                    .playing-lyric {
                        height: 20px;
                        line-height: 20px;
                        font-size: $font-size-medium;
                        color: $color-text-l;
                    }
                }
            }

            .middle-r {
                display: inline-block;
                vertical-align: top;
                width: 100%;
                height: 100%;
                overflow: hidden;

                .lyric-wrapper {
                    width: 80%;
                    margin: 0 auto;
                    overflow: hidden;
                    text-align: center;

                    .text {
                        line-height: 32px;
                        color: $color-text-l;
                        font-size: $font-size-medium;

                        &.current {
                            color: $color-text;
                        }
                    }
                }
            }
        }

        .bottom {
            position: absolute;
            bottom: 50px;
            width: 100%;

            .dot-wrapper {
                text-align: center;
                font-size: 0;

                .dot {
                    display: inline-block;
                    vertical-align: middle;
                    margin: 0 4px;
                    width: 8px;
                    height: 8px;
                    border-radius: 50%;
                    background: $color-text-l;

                    &.active {
                        width: 20px;
                        border-radius: 5px;
                        background: $color-text-ll;
                    }
                }
            }

            .progress-wrapper {
                display: flex;
                align-items: center;
                width: 80%;
                margin: 0px auto;
                padding: 10px 0;

                .time {
                    color: $color-text;
                    font-size: $font-size-small;
                    flex: 0 0 30px;
                    line-height: 30px;
                    width: 30px;

                    &.time-l {
                        text-align: left;
                    }

                    &.time-r {
                        text-align: right;
                    }
                }

                .progress-bar-wrapper {
                    flex: 1;
                }
            }

            .operators {
                display: flex;
                align-items: center;

                .icon {
                    flex: 1;
                    color: $color-theme;

                    &.disable {
                        color: $color-theme-d;
                    }

                    i {
                        font-size: 30px;
                    }
                }

                .i-left {
                    text-align: right;
                }

                .i-center {
                    padding: 0 20px;
                    text-align: center;

                    i {
                        font-size: 40px;
                    }
                }

                .i-right {
                    text-align: left;
                }

                .icon-favorite {
                    color: $color-sub-theme;
                }
            }
        }

        &.normal-enter-active, &.normal-leave-active {
            transition: all 0.4s;

            .top, .bottom {
                transition: all 0.4s cubic-bezier(0.86, 0.18, 0.82, 1.32);
            }
        }

        &.normal-enter, &.normal-leave-to {
            opacity: 0;

            .top {
                transform: translate3d(0, -100px, 0);
            }

            .bottom {
                transform: translate3d(0, 100px, 0);
            }
        }
    }

    .mini-player {
        display: flex;
        align-items: center;
        position: fixed;
        left: 0;
        bottom: 0;
        z-index: 180;
        width: 100%;
        height: 60px;
        background: $color-highlight-background;

        &.mini-enter-active, &.mini-leave-active {
            transition: all 0.4s;
        }

        &.mini-enter, &.mini-leave-to {
            opacity: 0;
        }

        .icon {
            flex: 0 0 40px;
            width: 40px;
            padding: 0 10px 0 20px;

            img {
                border-radius: 50%;

                &.play {
                    animation: rotate 10s linear infinite;
                }

                &.pause {
                    animation-play-state: paused;
                }
            }
        }

        .text {
            display: flex;
            flex-direction: column;
            justify-content: center;
            flex: 1;
            line-height: 20px;
            overflow: hidden;

            .name {
                margin-bottom: 2px;
                no-wrap();
                font-size: $font-size-medium;
                color: $color-text;
            }

            .desc {
                no-wrap();
                font-size: $font-size-small;
                color: $color-text-d;
            }
        }

        .control {
            flex: 0 0 30px;
            width: 30px;
            padding: 0 10px;

            .icon-play-mini, .icon-pause-mini, .icon-playlist {
                font-size: 30px;
                color: $color-theme-d;
            }

            .icon-mini {
                font-size: 32px;
                position: absolute;
                left: 0;
                top: 0;
            }
        }
    }
}

// 旋转动画
@keyframes rotate {
    0% {
        transform: rotate(0);
    }

    100% {
        transform: rotate(360deg);
    }
}
</style>
